﻿/*
 * Copyright (c) 2012, University of Southampton All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of University of Southampton nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.Xml;
using System.Diagnostics;
using System.Text.RegularExpressions;

namespace LabTroveWebParts
{
    [Serializable]
    [XmlRoot("dictionary")]
    public class SerializableStringDictionary<TKey, TValue> : Dictionary<String, List<String>>, IXmlSerializable
    {
        public SerializableStringDictionary()
            : base()
        {
        }

        public SerializableStringDictionary(Dictionary<String, List<String>> passedDictionary)
        {
            foreach (KeyValuePair<String, List<String>> val in passedDictionary)
            {
                if (val.Value.Count > 0)
                    this.Add(val.Key, val.Value);
            }
        }

        #region IXmlSerializable Members
        public System.Xml.Schema.XmlSchema GetSchema()
        {
            return null;
        }

        public void ReadXml(System.Xml.XmlReader reader)
        {
            XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));

            bool wasEmpty = reader.IsEmptyElement;
            reader.Read();

            if (wasEmpty)
                return;

            while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
            {
                string key = "key";
                string value = "value";
                string xmlStr = reader.ReadOuterXml();

                Regex rKey = new Regex(@"<\/.+>");
                Regex rValue = new Regex(@">.+<");

                char[] charsToTrim = { '<', '/', '>' };
                key = rKey.Match(xmlStr).ToString().Trim(charsToTrim);
                value = rValue.Match(xmlStr).ToString().Trim(charsToTrim);

                if (this.ContainsKey(key))
                {
                    foreach (string subVal in value.Split(';'))
                    {
                        this[key].Add(subVal);
                    }
                }
                else
                {
                    this.Add(key, new List<String>());
                    foreach (string subVal in value.Split(';'))
                    {
                        this[key].Add(subVal);
                    }
                }

                reader.MoveToContent();
            }
            reader.ReadEndElement();
        }

        public void WriteXml(System.Xml.XmlWriter writer)
        {
            XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));

            foreach (string key in this.Keys)
            {
                writer.WriteStartElement(key.ToString());
                for(int i = 0; i < this[key].Count; i++)
                {
                    if(i < (this[key].Count-1))
                    {
                        writer.WriteValue(this[key][i]+";");
                    }
                    else
                    {
                        writer.WriteValue(this[key][i]);
                    }
                }
                writer.WriteEndElement();
            }
        }
        #endregion
    }

}
